20987904

素因数分解:

$2^{14}\times 3^1\times 7^1\times {\mathrm{61}}^1$

素因数の和:99

約数の個数: 120

約数和(自身を含む): 65009728

約数和(自身を除く): 44021824

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 61, 64, 84, 96, 112, 122, 128, 168, 183, 192, 224, 244, 256, 336, 366, 384, 427, 448, 488, 512, 672, 732, 768, 854, 896, 976, 1024, 1281, 1344, 1464, 1536, 1708, 1792, 1952, 2048, 2562, 2688, 2928, 3072, 3416, 3584, 3904, 4096, 5124, 5376, 5856, 6144, 6832, 7168, 7808, 8192, 10248, 10752, 11712, 12288, 13664, 14336, 15616, 16384, 20496, 21504, 23424, 24576, 27328, 28672, 31232, 40992, 43008, 46848, 49152, 54656, 57344, 62464, 81984, 86016, 93696, 109312, 114688, 124928, 163968, 172032, 187392, 218624, 249856, 327936, 344064, 374784, 437248, 499712, 655872, 749568, 874496, 999424, 1311744, 1499136, 1748992, 2623488, 2998272, 3497984, 5246976, 6995968, 10493952, 20987904]

約数ペア:

[(1, 20987904), (2, 10493952), (3, 6995968), (4, 5246976), (6, 3497984), (7, 2998272), (8, 2623488), (12, 1748992), (14, 1499136), (16, 1311744), (21, 999424), (24, 874496), (28, 749568), (32, 655872), (42, 499712), (48, 437248), (56, 374784), (61, 344064), (64, 327936), (84, 249856), (96, 218624), (112, 187392), (122, 172032), (128, 163968), (168, 124928), (183, 114688), (192, 109312), (224, 93696), (244, 86016), (256, 81984), (336, 62464), (366, 57344), (384, 54656), (427, 49152), (448, 46848), (488, 43008), (512, 40992), (672, 31232), (732, 28672), (768, 27328), (854, 24576), (896, 23424), (976, 21504), (1024, 20496), (1281, 16384), (1344, 15616), (1464, 14336), (1536, 13664), (1708, 12288), (1792, 11712), (1952, 10752), (2048, 10248), (2562, 8192), (2688, 7808), (2928, 7168), (3072, 6832), (3416, 6144), (3584, 5856), (3904, 5376), (4096, 5124)]